The additional capacity is expected to help improve call reliability, boost data traffic capacity and enable more consistent network access so customers make the most of their AT&T devices.

AT&T launched its ultra-fast 4G LTE network in Detroit in September 2012.

AT&T claims the nation’s largest 4G network, covering more than 285 million people with ultra-fast speeds and a more consistent user experience. AT&T has also deployed two compatible 4G technologies to deliver more speed to more customers, which means AT&T customers can get 4G speeds outside of 4G LTE areas on 4G HSPA+, unlike competitors, where smartphone customers fall back to slower 3G technologies when outside of LTE coverage.

AT&T also says its network’s radio components are placed close to the antenna at most cell sites, instead of inside the base station, which helps minimize power loss between the base station and antenna and, in turn, improves the performance of our 4G LTE network. The network also is designed with its core elements distributed across the country, which helps reduce latency, or the delay when using the Internet, because data requests aren’t traveling as far.

Over the past five years, AT&T invested more than $115 billion into operations and into acquiring spectrum and other assets that have enhanced our wireless and wired networks. Since 2007, AT&T has invested more capital into the U.S. economy than any other public company.